I'm assuming you have the blade profiled at this point? All holes drilled? Depends on blade length. A short blade should be as prone to warp. With that said, you're not going to be much harding with the 416 so it's going to grind just fine post HT, and only have the thin center core of 1095.
I'm thinking grind post HT since I don't think there will be that much difference in work.
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